Shoring device



F. A. POOLE SHORING DEVICE Aug. 1, 1933.

Original Filed Aug. 13, 1928 F1a' PUULE Cil Patented `Aug. l, 1933 PATENT OFFICE K 1,920,433 SHORING DEVICE. Francis A. Poole, of Cleveland, Ohio Application August 13, 1928, Serial No. 299,243

Renewed December 2, 1932.

14 claims. v (c1. naanoo) My invention relates to shoring devices, and more particularly to an adjustable shore or prop for temporarily supporting or bracing walls, floors, scaifolds, false frame-work and the like. It is especially useful in connectionwith the erection of buildings and other. structures made of concrete, or other materials where a knockdown frame-worker temporary scaffolding is employed. As designed and constructed the device permits both wide and close adjustments to be made quickly and easily, and provides a strong prop and stable support for such loads as it is designed to carry, all Without danger of yielding, slipping or telescoping. The strength of this shoring device and itsinode and range of adjustment is such that it can be used to take up or compensate for the settling that usually occurs when the shore or prop is supported on loose earth or on a poor foundation, or when an additional weight or great stress is applied. The present device may also be used to supporta scaffold platform and to elevate the materials or occupants carried thereby. The device may also be used for bracing and shoring the walls of trenches or excavations of various widths, or as a jack or lifting implement. Accordingly, I do not wish to limit 'myself to the uses to which the device vmay be applied, nor to minute or exactdetails of construction, though showing and exempliiying a preferred embodiment of the invention in the accompanying drawing. Thus Fig; 1 is a front view, and Fig. 2 is a side elevation of one of my improved shoring devices. vl'ig. 3 is a sectional view of the working parts, and Fig. 4 a sectional view and side elevation, showing said parts in position toraise the cranking device. Fig. 5 is a side elevation of the locking pin. Fig. 6 is a perspective View of the operating mechanism. Figs. 7 and 8 are sectional views on lines '7-7 and 8-8 of Fig. 3 and Fig. 4 respectively. Y

The invention comprises a hollow column o1' tubular member A, an extensible member B tele'- scoped within one end oi column A, a pair of cooperating power-transmitting devices C and D for producing relative movement between the telescopic members A and B, and a shiftable locking element E for fastening' the devices C and D alternatively to base member A. As shown herein memberA is a tubularfmetalY Acolumn of angular cross section, having a flanged base part 2 to support it in an upright position or against a Wall. A slot or opening divides one side wall of member A lengthwise into two parts or flanges 4-4 which are provided with paired perforations 5-5 at uniformly spaced intervals substantially the full length of the column. In the present instancea sheet of metal is bent into the desired hollow angular shape with a single longitudinal slot or opening at one side, but it should be understood that this hollow column vmay be made or fabri- Extensible member B may consist of a solid wooden beam or squared piece of timber, as shown in Fig. 3, or it may be used as the extensible member, as illustrated in Fig. 4. In either case it telescopes or projects into hollow member A andv is detachably fastened to one of the power-opel`` ating devices, preferably to the square head 7 of the lift or push member D. Head 7 is hanged to embrace or socket the inner end of member B, and a screw, nailior bolt 8 secures the beam thereto. In using the pipe B its end is seated within a circular channel b in the top of head '7.

A screw-headed shaft or stem 9 is affixed to or forms an integral part of head 7, and this shaft extends through a yoke portion 12 of device C and also through a rotatable nut 10 which forms part of a mitre or bevelgear ll mounted within or upon device C. Ball or roller bearings 14 are employed to takerup the thrust of nut 19, when designed for heavy loads, but such bearings are omitted in a shore designed for light loads. Power is applied to gear 11 and nut 10 by a second bevel gear or pinion l5 on a short transverse shaft 16 which projects outwardly through the longitudinal slot or opening 3 where a crank handle 17 may be connected therewith'to-rotate theV gears and nut. Such cranking imparts a longitudinal movement to screw shaft 9, assuming the mounting C for the cranking mechanism is locked in a stationary position Within column or hollow member A.

Locking of device C is eifected by element E which is of. U-shape or bifurcated. to span slot 3 and project through the paired perforations 5 5 in flanges 4--4 of column A, it being further understood that corresponding openings are provided in the body of device C and in the opposite wall of column A to receive the bifurcated portions of locking element E, see Figs. 3 and '7. A squared foot portion 18 is connected by a reduced neck 19 to the central body portion of the device C, and chamber 2U within the neck 19 provides a closed space for screw shaft 9 to travel in and to hold a lubricant for the shaft. lThe bottom of foot portion 18 is provided with a circular groove to permit a beam, or. a pipe to be secured thereto, reference being had to the duplicate arrangement at the opposite end or head l of the` device for connecting a beam B or pipe B thereto as herein before described.

Assuming column A is to be yused in an upright position it is placed at rest upon a seating sur- Lio or push movement of device D and memb.

element E is then introduced into the perfor-ations in column A and passed through the transverse openings in the body portions oi device C, thereby locking this part to the column. Rotation oi the crank handle then operates the gears and nut and shifts the screw shaft and device D longitudinally within column A until the shorng movementl is accomplished, or until the maximum travel oi the screw shaft relatively to device C occurs. v

It the travel of the screw is not sufficient `to carry the shoring member or prop B against the parts to be engaged and supported, a second locking element E' is introduced into the perforated flanges and through head 'l ci device D to loc the same to column A. Locking element is then withdrawn from device C, and a reverse rotative movement given to the crank handle, which causes the nut to travel upwardly on the screw-shaft (now held in a stationary position in thocolumn)l thereby raising thecranlring mechanism bodily v within column A, thus locking this device again in a stationary position on the column for uo it El whenever the second locking element E is kmoved. A wide range of adjustment of the cranking mechanism and member B is afforded within column A without actuating thecranking mechanism, and then when the parts are locked as stated a more limited adjustment with power applied to the nut and screw shaft is available to either jamb the shoring appliance in position, to apply an expanding pressure, or to lift a load.

What I claim is: 1.` A shoring device, comprising a pair of telcscopicmembers, a power device including a pair of co-operating .members for effecting a spreading movement between said telescopic members, and means for locking saidpair of power device members alternatively at diierent places longitudinal-- ly to; one ofsaid telescopic members.

2. A shoring device,comprising a pair of extensible members, a pair of co-operating power-- transmitting devices for producing extensible movements between said members, and means f or alternatively locking each of said power devices adjustably to one or said extensible members.

3. A shoring device, comprising a-pair of extensible members, in combination with a having a body movable lengthwise of onemeinber, 'and an `extensible head engageable with the other member, and means for` locking the jack body and, the jack head alternatively to said 'first member.

4. A shoving device, comprising a pair of ytelcscopic members, a screw jack having a body slidably mounted within one member and including a push member engaging the other member, and means for locking said body and push member alternatively at different places lengthwise of one of said telescopic members.

5. A shoring device, comprising a tubular column; an extensible member; a push element ccnnected to said member; operating means for said push element, including a mounting shiftable lengthwise of said column; and means for locking said push element of said mounting alternatively to said column.

6. A shoring device, comp ising a tubular columnhaving a slot lengthwise thereof and perforations in its side walls, an extensible member extending into said column, a jack body mounted to slide within said column, means for locking said jack body to said column where perforated, and jack-mechanism mounted upon said jack body having an extensible head including means for locking said head to said column where perforated and an operating part extending through said slot in the column.

7. A snoring device, comprising a slotted column, an extensible member telescoped within said column, .a screw-jack including a body slidably confined within said column and a push member connected with said body, operating means for said push member engageable at said slot, and a device for locking either said b dy or said push member alternatively at spaced i tervals lengthwise of said column.

8. A shoring'device, comprising a hollow column, an extensiblevmember in telescopic connection` withsaid column, a jack screw engageable with the inner end ofsaid member, a jack body slidably mounted within said `column carrying gearing and a nut engaged with said screw, means for securing either said jack body or said screw to said column, and means for rotating said gearing either to move thejack bodyv or the screw relatively to the column.

9. A shoring device, comprisingV a hollow slotted column, an extensible member within said column, a jack body and lift screw having a head engaging said extensible member and the walls of said column to prevent turning movements therein, a rotatable nut and gearing mounted upon said jacl; body to operate said lift screw, operating means extendingithrough the slot in said column to rotate said gearing, and means for locking either saidjack body or screw hea tosaid column alternatively.

10. Al shoring device, including a perforated column, a jack body siidably mounted within said column, having perforations, a perforated lift member and gearing carried by said jack body, and locking devices adapted to be removably inserted within the perforations in said column and alternatively in the perforations in either said jack body or said lift member.

11. A snoring device, including a slotted column having spaced perforations bordering the slot therein, a jack slidably confined within said body, and a removable bifurcated element adapted to lock said jack in a stationary position upon said column where perforated, said element spanning the slot and connecting the idivided portions of the column.

12. A shoring device, including a hollow column, a jack body carrying a jack screw and screw operating devices, and locking devices for alternatively securing either said screw or jack body immovably to said column.

13. A shorlng device, comprising a pair of extensible members, a jack having a body slidably related to one of said extensible members and including a push element engageable with said other extensible member, and means for securf ing said jack member and push element alternatively at different places lengthwise of said 

